ASTM A372 Grade M Steel vs. AISI 305 Stainless Steel
Both ASTM A372 grade M steel and AISI 305 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is ASTM A372 grade M steel and the bottom bar is AISI 305 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 240 to 280 | |
| 170 to 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 18 to 21 | |
| 34 to 45 |
| Fatigue Strength, MPa | 450 to 520 | |
| 210 to 280 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 77 |
| Shear Strength, MPa | 510 to 570 | |
| 400 to 470 |
| Tensile Strength: Ultimate (UTS), MPa | 810 to 910 | |
| 580 to 710 |
| Tensile Strength: Yield (Proof), MPa | 660 to 770 | |
| 230 to 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 290 |
| Maximum Temperature: Mechanical, °C | 450 | |
| 540 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1450 |
| Melting Onset (Solidus), °C | 1420 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 480 |
| Thermal Conductivity, W/m-K | 46 | |
| 16 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 8.0 | |
| 2.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 9.1 | |
| 2.7 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 5.0 | |
| 16 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 2.0 | |
| 3.2 |
| Embodied Energy, MJ/kg | 27 | |
| 45 |
| Embodied Water, L/kg | 61 | |
| 150 |
Common Calculations
| PREN (Pitting Resistance) | 3.4 | |
| 18 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 | |
| 200 to 210 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1140 to 1580 | |
| 130 to 320 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 29 to 32 | |
| 20 to 25 |
| Strength to Weight: Bending, points | 24 to 27 | |
| 20 to 23 |
| Thermal Diffusivity, mm2/s | 12 | |
| 4.2 |
| Thermal Shock Resistance, points | 24 to 27 | |
| 13 to 15 |
Alloy Composition
| Carbon (C), % | 0 to 0.23 | |
| 0 to 0.12 |
| Chromium (Cr), % | 1.5 to 2.0 | |
| 17 to 19 |
| Iron (Fe), % | 92.5 to 95.1 | |
| 65.1 to 72.5 |
| Manganese (Mn), % | 0.2 to 0.4 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.4 to 0.6 | |
| 0 |
| Nickel (Ni), % | 2.8 to 3.9 | |
| 10.5 to 13 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.045 |
| Silicon (Si), % | 0 to 0.3 | |
| 0 to 0.75 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Vanadium (V), % | 0 to 0.080 | |
| 0 |